9.—(1) Network Rail may, for the purposes of the authorised works, enter on any of the streets specified in Schedule 4 (streets subject to street works) as are within the Order limits and may—
(a)break up or open the street, or any sewer, drain or tunnel under it;
(b)place apparatus in the street;
(c)maintain apparatus in the street or change its position; and
(d)execute any works required for or incidental to any works referred to in sub-paragraphs (a), (b) and (c).
(2) In this article “apparatus” has the same meaning as in Part 3 of the 1991 Act.